What is CVE-2020-13859?

CVE-2020-13859 is a critical-severity vulnerability in Mofinetwork Mofi4500-4gxelte, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-02-01.

How severe is CVE-2020-13859?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Mofinetwork Mofi4500-4gxelte

CVE-2020-13859

An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.0.8-std devices. A format error in /etc/shadow, coupled with a logic bug in the LuCI - OpenWrt Configuration Interface framework, allows the undocumented system account mofidev to login to the cgi-bin/luci/quick/wizard management interface without a password by abusing a forgotten-password feature.

Vulnerability class: Broken Authentication

Published 2021-02-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Mofinetwork Mofi4500-4gxelte
Mofinetwork Mofi4500-4gxelte Firmware — versions 4.0.8-std

Weakness classification (CWE)

References

mofinetwork.com/index.php (Patch, Vendor Advisory)
www.criticalstart.com/critical-vulnerabilities-discovered-in-mofi-routers/ (Technical Description, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13859?: CVE-2020-13859 is a critical-severity vulnerability in Mofinetwork Mofi4500-4gxelte, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-02-01.
How severe is CVE-2020-13859?: Critical severity. CVSS v3 base score is 9.8 out of 10.